The worm gears created by EP are square and so are considerably versatile for mounting. The machining of the parts, completed using numeric control devices, guarantees optimum precision for the restricted tolerances, producing a product which will remain reliable as time passes. The organizations are constructed of aluminium casings from sizes 025 to 090, as the sizes 110, 130 and 150 are made from cast iron. All the bodies are painted with RAL 9022 aluminium colour to protect the parts from aging and to give better safety against microblowholes that may be present in the aluminium. The gears are supplied with at least one filling connect that is also used during screening to check for feasible leaks. A CHM – WORM GEARED MOTORS AND WORM GEAR UNITS connection flange allows two gears to become combined in order to obtain high equipment ratios. Four sizes of CHPC pre-stage gears are available to set with the gears; they are also constructed in aluminium and are painted just like the worm gears
Gears that are supplied with mounting flanges must be assembled with motors whose shaft and flange tolerances match a “normal course” of quality in order to avoid vibration and forcing of the input bearing. Motors supplied by Chiaravalli Group S.p.A. guarantee that this necessity is fulfilled. For simple consultation, the correspondence of the size of the B5 and B14 engine with the sizes of the shaft and the motor connection flange are demonstrated in the following table. Remember that, as the electric motor connection flanges are separate from the body it is also possible to have a shaft / flange mixture that will not correspond to the table, electronic.g. 19/140, therefore offering adaptability for other non-unified models like the brushless or direct current types.